Arrangement of windings for electromagnetic clutches.



AST.

ARRANGEMENT 0P WINDINGS FOR ELECTROMAGNETIC OLUTGHES.

APPLICATION FILED DEC. 26, 1902.

918,254. Patented Apr, 13, 1909.

5 SHEETSSHEET 1.

win/55m: M L/Qrf wymrm I MMQJM W gag/9 Arm/em I H. AST. ARRANGEMENT 0F WINDINGS FOR ELECTROMAGNETIC GLUTOHES.

' APPLICATION FILED DEG. 26, 1908.

918,254. Patented Apr. 13, 1909.

H. AST. ARRANGEMENT OF WINDINGS FOR ELECTROMAGNETIC 'CLUTCHES. APPLICATION rum DEC. 2a, 1908.

91 8,254. Patented Apr. 13, 1909.

6 SHEETS-SHEET 3.

@ i iii l/WE 70 W #WWMW A Ii 2? JMQL ii? BVMQ/JM H. AST. ARRANGEMENT or WINDINGS FOR ELECTROMAGNETIC OLUTOHES.

. APPLICATION FILED DEC. 26, 190B. 9 1 8,254: Patented Apr. 13, "1909.

6 SHEETSSHEET 6.

AZTOR/YEK UNITED STATES PATENT OFFICE.

uni-un on AST, or VIENNA, AUSTRIA-HUNGARY.

ARRANGEMENT or wmnmes FOR ELECTROMAGNETIC (muons.

Specification of Letters Patent.

Patented April 13, 1909.

Application filed December 26, 1908. Serial No. 469,371.

To, all whom it may concern:

Be it known that I, HEIiYRIGH.AST,'S 11bject of. the Emperor of Austria'-Hungz try, residing at Vienna, in the Empire of Austria -Hungary, have invented certain new and useful Improvements the Arrangement of ,VVindings for Electromagnetic Clutches, of which the following is a specification.

This invention relates to'wire windings of that kind which, as is' particularly the case which are otherwise sub ected to influences detrimental to the insulation.

The object of the invention consists in surrounding wire windings of this kind with an insulating envelop in such a manner that the winding together with the envelop forms a body which is closed air tight and moisture-tig'ht, can belmade on any place outside .of the place of its use, can be conveyed with easeand security and can be mounted up at the place of its use even by unskilled assistants without danger for the integrity of the insulation. At the same time the windings arranged according to the resent in-- vention do not admit the access 0 any gases, vapors or liquids dangerous to the insulation nor do they admit within the more or less closed seats of the winding arrangements the formation of moisture which would most certainly take place in consequence of the heat developed internally by the action of the. current and on the other hand in consequence of the'cold environment.

The above mentioned envelop consists of a metallic casing'or sheath the interior w1nd-.-

. ing'space of which, that is intended for the reception of the insulated wire, is lined with insulating layersa'ndis covered on its exterior periphery bya'tlghtly closing or V soldered case or cover, the-arrangementbe ing such that the places of outlet of the ends of the windings can be easily and tightly stopped up.

For. enabling-the "jeasy and convenient carrying away-of the heat originated by the current, the said metallic: casing can be formed at its outer surface with ribs and 1s 'rangeinent provided at the places of outlet of the ends of the windings with enlargements so as to secure an air-tight and moisture-tight outlet of the winding ends and in particular a secure insulation of the joints of these outlet ends to the leading-in wires.

In the accompanying drawings Figure 1 shows by way of example a form of executionfof an nnproved winding arrangement modified forms of execution of 'a wii'iding arrangement according to the present invention. Fig. 10. isa cross'section through the windingarrangement shown in Fig. 9 on the line GH of Fig. 9. Fig. 11 1s a cross section through a clutch member provided'with adouble winding arrangement embedded within the same. Fig. 12 is a side elevation of a part of this winding ar- Fig. 13 is a cross section on the line I-J of Fig. 12. Fig. 14 is a plan of the arrangement shown in Fig. 13 and partly a section through the same' on the line KL of Fig. '13. Fig. 15 is a cross sect-ion through a clutch member with a triple'winding arrangement embedded within the same and Fig. 16'is a side view of a part of this arrangement. Figs. 17 and 18 show electromagnetic clutches in sectional views presenting further forms of execution of. winding arrangements according. to the- 'd which after being slid upon the flanges 1 of the casing is rigidly fixed onto the same or may besides be soldered to it. In order to obtain. abetter and tighter connection of the said parts the walls 5, (Z and one' of the flanges a can be encompassed at several places by clips 7' which besidesserve for the fitting. up'of the whole winding" arrangementat the place of its use and can be screwed on within the annular channel of a member of an electromagnetic clutch in which the winding should be fitted.

One of the flanges 0 or both flanges are provided with enlargements g in which can be conveniently and easily located the thickened parts produced by the joints of the ends of the windings, with the leading-in wires. In order to enable a tight closure or mounted up in its proper place of use even by unskilled hands without having to fear a deterioration of the insulation; spare windings can be easily and permanently stored in any place whatever. Furthermore the improved winding arrangement prevents any damage of the insulation by the precipitation of moisture which, as is well known, is frequently formed upon the surrounding iron parts particularly when the arrangement is working intermittently.

Figs. 3 and 4 represent the way in which a: winding arrangement of the kind referred to is fitted up in an electromagnetic clutch. This clutch consists of the two coupling members M' and N (the magnet body and the armature disk, respectively) that are fitted upon the shafts m, a. The winding -a incased in the metallic casings Z), c and d in' the manner above described and sur rounded by insulating layers 6 is mounted in the annular channel 7' of the magnet memberjM and fixed therein by fastening the clips f thatsurround the casings to the magnet member ,M by means of screws. Each of he two leading-in wires 11 issuing out of a short tube piece it isled through a recess l of the magnet member to the corresponding terminal 39; the recess may be covered by a plate 0. The leading-1n wire 2 is made preferably in two parts for the purpose of facilitating the mounting up of the same and "the two parts of this wire are connected'by a sleeve 9.

Fig. '5 is a sectiona ew showing end he winding a with the leading-1n wire 2" means of a short tubular piece 71 of the enlarged part 9 at one of the "two flanges 0. p 3

AccordingtoFig. 6 the connection of the and (Z at the edges of the the connection of one nular strips 1'. These strips produce a tight closure in such a manner that they overlap the adjacent parts of the flanges 0 as also the bent down edges of the casing d that are placed upon the inwardly bent down edges of the flanges 0. The space left be tween the winding and the socket d can be filled with a suitable heat conducting material, preferably with gypsum e. i

Fig. 7 shows a winding arrangement embedded in the annular channel y" ofthe magnet member M of the clutch the casings I) and d of the same overlapping the annularlateral flan es c and carrying the angular pieces f soldered thereto and through which pass the screws is intended for fixing the winding to the magnet mem ber M.

The heat generated by the current, in conjunction with the cold environment. of the winding, frequently produce a precipitation of the moisture of the atmosphere onto the more or less closed seats (channels and the like) in which the casings Z), (Z connected together are arranged. In order to rapidly carry away the said heat generated by the current in the casings Z), (Z may be provided with suitable refrigerating ribs or with a suitable ventilating device or they may be cooled by means of refrigerating liquids. Fig. 8 shows a winding arrangement embedded in the annular channel j of the magnetmember M, the two casings b, d-of the said wii'iding arrangement being connected with the annular lateral flange c that lies nearest to thebottom of the annular channel j by sliding the same upon this flange or by' soldering onto the same a ring 7',- whereas the second lateral flange c that is arranged on the exterior -is. widened and, together with the edgesTnfthe-casings b and d bent off at right angles, is fastened to the magnet member M by means of the screws k. This lateral flange is provided on its exterior surface with projecting ribs 0 having for purpose the ventilation and consequently the better cooling of the winding arrangement.

Figs. 9 and 10 show a winding arrangement in which the flanges c of the casing Z) are screwed on to the edges of the casing d that are bent in the same direction and the pairs of the casing edges lying on the outside of the annular channel of the magnet member M are enlarged to such an extent that they can be afiixed to the magnet member by means of screws in. The casing 72 is provided with cooling ribs 6' extending over the flanges 0 of the same and in a like manner the casing (Z between the pairs of casing-edges connected together-is provided withcooling ribs cl". For affording the exterior air an easy access to the cooling ribs and for permitting a rapid exhaustion of the airfrom .the winding arrangement the winding of lubricants, for instance of oil. as

also of. liquids or vapors that may endanger the integrity of the electrical insulation and preserve the same from the influence of mechanical interference, the winding remains permanently unaltered and is therefore always ready for working.

For larger installations of electromagnetic clutches 2 or more of the windings as above described, each winding closed for itself, can be arranged, the said multiple 'windings being separated from each other preferably by free annular spaces facilitating the-cooling of the windings. The windings themselves are in this case connected with each.

other and for this purpose it is preferable to provide the casings at their exterior periphery with outlet openings and with short tubular pieces capable of being stufled up in a similar manner as has been described in the foregoing with reference to the outlets of the leading-in wires.

Figs. 11 to 14 show a similar double winding arrangement. 'M is-the magnet member of an electromagnetic clutch of larger dimensions. In the annular channel 7' of the magnet member M are located one asideof the other two Winding arrangements of the kind above described, each "comprising a casing by way of example of the kind shown in Fig. 2. 'On their lateral flanges 0 adjacent to'eachother they are provided with refrigerating ribs (1 that serve as distancing pieces'for creating ventilating channels between the two winding arrangements. The clips f encompass both winding arrangements and each clip is covered on its ends by a fish nlate f and together with the latter is aflixed to the magnet member by means of screws k. The short tubular pieces h for the outlet of the leading-in wires "2' that are made so as to, be capable'of being stuffed up, are arranged near one edge of each casing d as is shown in Figs. 13 and 14 the sectional views showing also the enlargement 9 with which the tubular piece it coinmunicates.

Figs. 15 and 16 show three winding arrangements fitted up one aside of the other in the annular channel 7' of the magnet member M and all encompassed by clips 1 common to all winding arrangements. Each individual winding arrangement is aflixed to the clips I by means of screws t which pass through the clips f and are screwed into the casings b and (1 respectively. The clips 1'' are themselves affixed to the magnet mempart of electromagnetic .clutches.

'said channel.

her M by means of screws 7. and the annular channel j commui'iicates with recesses it made in the magnet member and leading to the outward. atmosphere for the purpose of ventilating the Winding arrangements.

Figs. 17 and 18 illustrate the manner in which windingarrangements of a modified construction are fitted up in a stationary According toFig. 17 the windingarrangement is located in a magnet member M (if-annular shape composed of two halves fitted between the clutch members M and N and attixed to a sealing bracket 11 .or the like. The casing (l of the Winding arrangement carries oniits periphery the tubular pieces I: for the leading in wires 2' that are conducted through the perforations s of the magnetmember M: A number of screws 0 that are screwed into a flat ring 1) attixed to the lateral'fiange and that pass through the magnet member M are bearing against one of the lateral flangesv (2 so that the winding arrangement is rigidly held'in the annular chamber j of the magnet member M. In the modification shown in Fig. 18 the winding arrangement is equally located in a stationary magnet member M made of two halves and encompassed on the exterior by the clutch. members M and N which are of a larger diameter than the magnet member M The winding arrangement as also the annular channel 1n which it is embedded possess in this case not a quadrangular but a trapezoid cross section, 'in order to facilitate the introduction of the winding arrangement in the annular channel and the removal of'the samefrom the The short tubular pieces It for the leading-in wire 2' are 'inthis case arranged on the periphery of the casing b and are directedwith their free ends against the shaft 12-. 'The winding arrangement is affixed in the annular channel j by means of screws i: that pass through the magnetmember M and are screwed into nutsv affixed to one of the lateral flanges Claims.

1. In an electromagnetic clutch: a protected magnetizing coil sealed against gases,- liquidsor other external influences detrimental to the insulation of said coil, and comprising an insulated winding; leading-in wires; a metallic casing and suitable flanges orside pieces adapted to retain said winding; insulating material enveloping said winding; a. closing second casing or cap fitted over said flanges or side pieces; en-' largements in the inclosing casings to accommodate the connection of the leading-in wires with the ends 'of said w-inding; and tubes secured .to said enlargements and through which said leading-in wires are conducted, said tubes being sealed and thereby insulating said leading-in wires.

2. In an electromagnetic clutch a magnet member; a-protected magnetizing coil sealed against gases, liquids or other external influences detrimental to the insulation of said coil, andcomprising an insulated winding; leading-in wires; a metallic casing and suitable flanges or side pieces adapted to retain said Winding; insulating'material enveloping said Winding; a. closing second casing or cap fitted over-said flanges or side pieces; enlargements in the inclosing casings to accommodate the connection of .the leading-in Wires with theends of said Winding; tubes secured to said enlargements and through which the said leading-in Wires are conducted, said tubesbeing sealed and thereby insulating said leading-in-"wires; and means carried bysaid casin said magnet member. I

In an electromagnetic clutch: agnagnet member; a protected magnetizing coilisealed against gases, liquids or other externalinfiuences detrimental to the insulation of said coil, and comprising an lnsulated Winding; lead1ng-1n wires; a metallic casing and suitgs to secure said coil to.

able flanges or side pieces adapted to retain said Winding; insulating material enveloping said winding; a closingksecond casing fitted oversaid flanges or-side piecestenlargements in the inclosing casings to accommodate the connection of the leading m wires with the endsofsaid Winding; tubes secured to said enlargements and through which the said leading-1n wires are conducted, said tubes being sealed and thereby insulating said leading-in wires; means carried by said casings to secure said 0011 to said magnet'lnember; and means inconneef tion with said casings to promote ventilatlon of the space occupied by said coil and to assist in the dissipation of the heat generated. In testimony whereof I have hereunto'set my hand in presence of two subscribing wit 

